Online medicine-adding control method and system for wastewater treatment

Abstract

The invention discloses an online medicine-adding control method and system for wastewater treatment. The method comprises the following steps: obtaining current incoming water monitoring index data,and inputting the current incoming water monitoring index data into an online medicine-adding control model to obtain current optimum medicine-adding quantity; wherein the online medicine-adding modelis constructed through adopting a principal component analysis algorithm, a genetic algorithm and a neural network model algorithm; by the principal component analysis algorithm, the dimensionality of a training sample is reduced, the speed of a BP neural network model is improved, and the speed of medicine-adding quantity calculation is improved; by the genetic algorithm, the connection weight value and threshold value of the BP neural network model are optimized, the prediction accuracy of the BP neural network model is improved and is difficult to fall into local optimum; therefore, by adopting the online medicine-adding control model provided by the invention, the defect that the medicine-adding quantity is difficult to accurately determine by a medicine-adding mode in the wastewatertreatment process is overcome, and the rapid and accurate online medicine-adding control process is realized.

Description

technical field [0001] The invention relates to the technical field of waste water treatment in thermal power plants, in particular to an online dosing control method and system for waste water treatment. Background technique [0002] The wastewater treatment process of thermal power plants is a nonlinear dynamic system with multi-variable, large lag, dynamic and serious interference, and it is a complex industrial process that is difficult to control. Realizing the automation of waste water treatment in thermal power plants is a necessary condition for realizing modern treatment and modern management, and it is a necessary means to improve the effect of waste water treatment and reduce costs. Coagulation, flocculation and other processes are indispensable and important parts in the process of wastewater treatment in thermal power plants. The process is a complex physical and chemical reaction process, which requires high control accuracy for the type and dosage of chemicals...

AI Technical Summary

Problems solved by technology

Coagulation, flocculation and other processes are indispensable and important parts in the process of wastewater treatment in thermal power plants. The process is a complex physical and chemical reaction process, which requires high control accuracy for the type and dosage of chemicals. Traditionally, the amount of chemicals added is Operators judge based on the water quality of the effluent. In order to meet the requirements of the effluent water quality, a lot of time and labor are wasted by repeatedly adjusting the dosage of chemicals. Finally, it is basically a long-term constant state, which not only causes invisible waste of medicines, but also due to the time-varying characteristics of incoming water quality, the water output index cannot meet the real-time requirements of users

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